Question

My UserControl has a TextBox, that is subscribed to OnTextChanged event. However, since a lots of business logic and integrations happens on server, I want to disable a form while postback is being performed with some client-side javascript and I’m not sure how to achieve it the right way.

Can I solve this with ClientScriptManager.GetPostBackEventReference?

Edit: as my question seems to be misunderstood:

TextBox is subscribed to event OnTextChanged=”tb_TextChanged” which will result on client in onchange=__doPostBack(‘tb’) so I want to inject my javascript disableForm() to onchange DOM event. I know how to implement disableForm(), the question is how to inject my javascript properly?

Answer 1

I would suggest you use the javascript onblur event and check if the field value is changed. If so, you can use jQuery like the below to disable the form elements.

To disable a form element such as a text input or a button (with a made-up id: #elm):

$("#elm").attr("disabled", "disabled");

To enable a disabled form element:

$("#elm").removeAttr("disabled");